反应速率

The overall rate and the overall activation energy of AA-Na polymerization have been determined by gravimetry.

同时用重量法研究了聚合反应过程中的动力学行为，得到了反应的速率方程及反应的活化能。

The distribution of main elements in surface and interior of IPNs were also analyzed by XPS.

聚氨酯/聚硅氧烷IPN中聚氨酯的交联反应仍为二级反应，只是聚硅氧烷的存在大大降低了聚氨酯网络的交联速率，并增加了反应活化能。

The results of calculation show that the reaction of SiH insertion into HF is thermodynamically dominant at low temperature and kine tically favored at high t...

该反应在研究的温度范围内是一放热、熵减少的反应，反应的速率常数随温度的升高而增大，且服从Arrhenius定律。

At the optimum condition, which is at normal pressure and temperature 175-185 ℃, in mole ratio of phenol to DMC of 3:1, in 2 weight percent of catalyst to DMC, in 9ml/h of DMC feed rate and for reation period of about 12 hours, the yield of DPC is 23.5%, methyl phenyl carbonate yield is 47.89%, and the conversion of DMC is 82.4%. The reaction process was monitored and the reaction products were analyzied through gas chromatography and mass spectrograph.

在最适宜的反应条件下，即常压、温度在175-185℃范围内、苯酚与DMC摩尔比为3：1，催化剂与DMC摩尔比为2%左右、DMC滴加速率为9m1/h、反应12h，反应DMC总转化率为82。

The self-exchange reactions of quinone were studied with AMl and ESR at the sametime,and the solvent effects were also studied.

用半经验的AM1方法和ESR技术分别研究了醌的自交换电子转移反应，计算并测定了自交换反应的速率常数，进一步研究了溶剂性质对电子转移反应的影响。

The reaction order of each component was also investigated. It was found that the influence of complexing agent was the greatest, followed by oxidant and reductant.

为了确定各组分对化学沉积速率的影响程度，根据化学镀的电化学反应机制所得出的反应式，计算了各组分的反应级数。

The reaction mechanism of thione-thiol tautomerism for 2,6-dithiopurine obtained from proton transfer has been investigated by DFT B3LYP method with 6-311＋G basis set. The reaction enthalpies, activation energies, activation free energies and the rate constants of tautomerism were obtained.

采用密度泛函B3LYP方法，在6-311＋G基组水平上对2，6-二巯基嘌呤质子转移引起的硫醇式与硫酮式互变异构反应进行了计算研究，获得了互变异构过程的反应焓、活化能、活化吉布斯自由能和质子转移反应的速率常数等性质。

The thermodynamics of TNR solution was studied by analyzing heat-flux to time curves,the rate constant of reaction and the reaction order were determined to be 1.632×10-3 s-1 and 0.6158,respectively.

同时，对TNR溶液反应的动力学进行了研究，通过分析热流对时间的曲线图，确定了该溶解反应的速率常数为1.632×10-3s-1，反应级数为0.6158。

The experimental results showed that the aquation of JM216 follows the pseudo-first-order- rate law, of which the observed-rate constant kobs is 5.0×1.0-6min-1and the half life period t1/2 is 96.25 days at 37℃.

结果表明，JM216的水合反应为准一级反应，反应对JM216为一级，37°C时水合反应表观速率常数为kobs=5.0×10-6min-1，半衰期t1/2＝96.25天。

Amination reaction was carried out at temperature of 90℃ to 150℃ for 2h to 10h and then ashless dispersant of polyisobutylene succinimide would be obtained after dehydration with the operations of vacuum distillation and filtration.

结果发现，实验在N_2保护下进行，BPO／PIB质量比为0.035，MA／PIB摩尔比为1.3，反应温度为150℃，反应时间为12h，搅拌速率为250rpm，引发剂过氧化苯甲酰以丁酮为溶剂分六次，时间间隔为30分钟，均量地加入反应器时，烃化反应物聚异丁烯的转化率最高。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。